Fukoku-developed battery hold sheets are expertly designed to control the force of expansion and contraction between battery cells. As the energy density of the battery increases, the expansion and contraction of the battery cells due to charging and discharging will increase. If this expansion and contraction can be controlled optimally, the battery can reach peak performance. With our superior knowledge of material compounding technology and non-linear analysis technology, Fukoku’s battery hold sheets can be customized to provide optimal battery performance – making batteries more reliable, efficient, and optimally controlled.